EP3346629B1 - Verfahren und vorrichtung zur übertragung von informationen - Google Patents

Verfahren und vorrichtung zur übertragung von informationen Download PDF

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Publication number
EP3346629B1
EP3346629B1 EP16840848.2A EP16840848A EP3346629B1 EP 3346629 B1 EP3346629 B1 EP 3346629B1 EP 16840848 A EP16840848 A EP 16840848A EP 3346629 B1 EP3346629 B1 EP 3346629B1
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EP
European Patent Office
Prior art keywords
frequency domain
sequence
ack
nack
information
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English (en)
French (fr)
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EP3346629A1 (de
EP3346629B9 (de
EP3346629A4 (de
Inventor
Xianghui HAN
Shuqiang Xia
Bo Dai
Wen Zhang
Jing Shi
Qian Dai
Wei Gou
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/7143—Arrangements for generation of hop patterns
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0055—ZCZ [zero correlation zone]
    • H04J13/0059—CAZAC [constant-amplitude and zero auto-correlation]
    • H04J13/0062—Zadoff-Chu
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2078—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the phase change per symbol period is constrained
    • H04L27/2082—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the phase change per symbol period is constrained for offset or staggered quadrature phase shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26136—Pilot sequence conveying additional information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency

Definitions

  • the disclosure relates to, but not limited to a wireless communication technology, and in particular to a method and device for transmitting information.
  • the rapid development of the mobile internet and the internet of things trigger explosive increase of data traffic and extensive appearance of diversified and differentiated services.
  • the fifth generation mobile communication technology (5G) serving as a new generation mobile communication technology, will support a higher rate, a huge number of links, an ultralow delay, higher reliability, hundredfold increase of energy efficiency and the like so as to support requirement changes.
  • the ultralow delay serving as a key index of the 5G technology, directly affects development of delay-limited services such as car networking, industrial automation, remote control and smart grids.
  • a current series of standard researches on 5G delay reduction is promoting gradually.
  • TTI Transmission Time Interval
  • the transmission structure of a related Physical Uplink Control Channel (PUCCH) for sending an Acknowledgement (ACK) and a Negative Acknowledgement (NACK) cannot be directly used.
  • PUCCH Physical Uplink Control Channel
  • ACK Acknowledgement
  • NACK Negative Acknowledgement
  • shortening of the TTI in time domain will affect the demodulation performance of transmitted information, and the related PUCCH is in shortage of frequency domain diversity due to occupancy of only one Physical Resource Block (PRB) in frequency domain.
  • PRB Physical Resource Block
  • reduction of the number of symbols within the TTI will cause reduction of available resources for transmitting valid data due to excessive overheads of a Reference Symbol (RS).
  • RS Reference Symbol
  • TEXAS INSTRUMENTS "ACK/NAK Transmission without Reference Signal Overhead in E-UTRA Uplink"
  • 3GPP DRAFT; R1-070275 (XP050104310 ) disclosed a non-coherent ACK/NAK transmission method using a cyclic shifted CAZAC sequence, where the amount of cyclic shift of the CAZAC sequence carries ACK/NAK bits, and the ACK/NAK bits are one-to-one mapped on a cyclic shifted version of the base CAZAC sequence.
  • EP 2605442 A2 disclosed a method for supporting the transmission of SRS (sounding reference signals), in which a comb spectrum can be used for the transmission of a DMRS or SRS.
  • Steps shown in the flowchart of the drawings may be executed in a computer system including, for example, a set of computer-executable instructions. Moreover, although a logic sequence is shown in the flowchart, the shown or described steps may be executed in a sequence different from the sequence here under certain conditions.
  • the embodiments of the disclosure provide a method for transmitting information. As shown in FIG. 1 , the method, based on a UE side, includes the steps as follows.
  • a predefined pattern for carrying information is determined.
  • the predefined pattern includes a predefined sequence or a predefined RS time frequency structure.
  • step 102 the predefined pattern carrying the information is transmitted on a preset time-frequency domain resource.
  • the information includes ACK or NACK.
  • the predefined pattern comprises the predefined sequence, the preset time-frequency domain resource includes a preset time domain resource and a preset frequency domain resource; the preset time domain resource includes a TTI with a duration of K symbols, where K is greater than or equal to 1 and smaller than or equal to 7, and K is a positive integer; and the preset frequency domain resource includes M subcarriers, the M subcarriers being mapped as a comb structure in frequency domain, wherein a frequency domain offset number N is an integral multiple of 2, and M is an integral multiple of 12.
  • M may be 48 or 72.
  • the frequency domain offset refers to an offset of an initial subcarrier index relative to a lowest index of a corresponding resource block when M subcarriers are mapped to a comb structure in frequency domain, and the frequency domain offset number is a total number of all possible offsets. For example, when a subcarrier is used as a mapping interval, namely when one of every two subcarriers is mapped, the frequency domain offset number is 2, and the frequency domain offset is 0 or 1.
  • the predefined sequence has a length L, which is an integral multiple of 12
  • a basic sequence of the predefined sequence includes a QPSK-based sequence or a ZC sequence, and a sequence in the predefined sequence is obtained based on the basic sequence.
  • the basic sequence of the predefined sequence is the ZC sequence.
  • L is 24 or 36.
  • the basic sequence of the predefined sequence is the QPSK-based sequence.
  • the basic sequence of the predefined sequence is the ZC sequence.
  • step 102 may include the sub-step as follows.
  • the predefined sequence is transmitted according to a first preset rule by using the M subcarriers at the TTI with the duration of K symbols.
  • the first preset rule includes:
  • the first preset rule further includes:
  • step 102 may include the sub-step as follows.
  • the predefined sequence is transmitted for each symbol of K symbols in the TTI in the following manner: transmitting the predefined sequence by using the M subcarriers in a preset 1-symbol duration.
  • step 102 may include the sub-step as follows.
  • the information is sent at frequency domain positions Y or a subset of Y within the TTI having a 1-symbol length.
  • one or more sequences transmitted at the frequency domain positions Y or the subset of Y and used for carrying the information are sequences used for transmitting the information at frequency domain positions X, or a repetition of sequences used for transmitting the information at frequency domain positions X, or truncation of sequences used for transmitting the information at frequency domain positions X, or punching of sequences used for transmitting the information at frequency domain positions X, or redefined sequences.
  • an SRS is sent at a frequency domain position Q in the last symbol of a subframe, and an SRS is sent at a frequency domain position P in all other symbols of the subframe.
  • the frequency domain position P and the frequency domain position Q are not intersected.
  • a sequence for carrying ACK/NACK is sent at frequency domain positions Y or a subset of Y in the same symbol.
  • the present solution of the disclosure implements a scenario where ACK/NACK and SRSs are transmitted within the same symbol when a TTI is reduced to a 1-symbol length, and further points out that the ACK/NACK and the SRSs are sent at the frequency domain position Q for sending SRSs instead of the frequency domain position P for sending ACK/NACK, so that functions of the SRSs and feedback for the ACK/NACK can be implemented simultaneously, and the SRSs are not sent any longer.
  • both SRSs and ACK/NACK adopt a comb structure in frequency domain, sending of the SRSs is eliminated, and the ACK/NACK can be sent.
  • the redefined sequence may be a sequence determined by a person skilled in the art and having good self-correlation, low cross correlation and a low peak-to-average ratio.
  • the redefined sequence is defined as double repetition for sending, at frequency domain positions Y, a sequence (assumed to be defined as a sequence A) used for transmitting the information at frequency domain positions X, the sequence A may be sent at even subcarrier positions of the frequency domain positions Y, an inverted sequence of the sequence A is sent at odd subcarrier positions of the frequency domain positions Y, and it may be ensured that the redefined sequence has a low peak-to-average ratio.
  • an index of the basic sequence is acquired in at least one of the following manners: allocation by a base station; calculation according to a physical layer cell identity of a cell; obtaining according to a timeslot index; and obtaining according to an index of the TTI.
  • An index of the cyclic shift is acquired in at least one of the following manners: allocation by a base station; calculation according to a physical layer cell identity of a cell; calculation according to a C-RNTI allocated to a UE by a cell; obtaining according to a timeslot index; and obtaining according to an index of the TTI.
  • step 102 may include the sub-step as follows.
  • the RS is sent by at least using a symbol duration, the RS time frequency structure being used to represent ACK information or NACK information in the information, wherein the RS time frequency structure includes: different symbol positions used by RSs in time domain, or different contiguous subcarrier positions in frequency domain, or different comb subcarrier offsets in frequency domain.
  • the method may further include the step as follows.
  • Channel state information is transmitted on the preset time-frequency domain resource, the channel state information including at least one of the following: CQI, PMI, or RI.
  • a predefined pattern for carrying information is determined, the predefined pattern includes a predefined sequence or a predefined RS time frequency structure; and then, the predefined pattern carrying the information is transmitted on a preset time-frequency domain resource.
  • the embodiments of the disclosure also provide a device 10 for transmitting information.
  • the device 10 may be arranged in a UE, and includes a determination unit 11 and a transmission unit 12.
  • the determination unit 11 is arranged to determine a predefined pattern for carrying information, wherein the predefined pattern includes a predefined sequence or a predefined RS time frequency structure.
  • the transmission unit 12 is arranged to transmit the predefined pattern carrying the information on a preset time-frequency domain resource.
  • the information includes ACK or NACK.
  • the preset time-frequency domain resource includes a preset time domain resource and a preset frequency domain resource, wherein the preset time domain resource includes a TTI with a duration of K symbols, where K is greater than or equal to 1 and smaller than or equal to 7, and K is a positive integer; and the preset frequency domain resource includes M subcarriers, the M subcarriers being mapped as a comb structure in frequency domain, wherein a frequency domain offset number N is an integral multiple of 2, and M is an integral multiple of 12.
  • M may be 48 or 72.
  • the predefined sequence has a length L, which is an integral multiple of 12
  • a basic sequence of the predefined sequence includes a QPSK-based sequence or a ZC sequence, and a sequence in the predefined sequence is obtained based on the basic sequence.
  • the basic sequence of the predefined sequence is the ZC sequence.
  • L is 24 or 36.
  • the basic sequence of the predefined sequence is the QPSK-based sequence.
  • the basic sequence of the predefined sequence is the ZC sequence.
  • the transmission unit 12 is arranged to: transmit the predefined sequence according to a first preset rule by using the M subcarriers at the TTI with the duration of K symbols.
  • the first preset rule includes:
  • the first preset rule further includes:
  • the transmission unit 12 is arranged to: transmit the predefined sequence for each symbol of K symbols in the TTI in the following manner: transmitting sequences in the predefined sequence by using the M subcarriers in a preset 1-symbol duration.
  • the preset time domain resource is a TTI having a 1-symbol length
  • the transmission unit 12 when a UE needs to send an SRS at a frequency domain position Y whilst needing to send the information at a frequency domain position X, the transmission unit 12 is arranged to: send the information at frequency domain positions Y or a subset of Y within the TTI having a 1-symbol length.
  • one or more sequences transmitted at the frequency domain positions Y or the subset of Y and used for carrying the information are sequences used for transmitting the information at frequency domain positions X, or a repetition of sequences used for transmitting the information at frequency domain positions X, or truncation of sequences used for transmitting the information at frequency domain positions X, or punching of sequences used for transmitting the information at frequency domain positions X, or redefined sequences.
  • an index of the basic sequence is acquired in at least one of the following manners: allocation by a base station; calculation according to a physical layer cell identity of a cell; obtaining according to a timeslot index; and obtaining according to an index of the TTI.
  • An index of the cyclic shift is acquired in at least one of the following manners: allocation by a base station; calculation according to a physical layer cell identity of a cell; calculation according to a C-RNTI allocated to a UE by a cell; obtaining according to a timeslot index; and obtaining according to an index of the TTI.
  • the transmission unit 12 is arranged to: send the RS by at least using a symbol duration, the RS time frequency structure being used to represent ACK information or NACK information in the information, where the RS time frequency structure includes: different symbol positions used by RSs in time domain, or different contiguous subcarrier positions in frequency domain, or different comb subcarrier offsets in frequency domain.
  • the transmission unit 12 may be further arranged to: transmit channel state information on the preset time-frequency domain resource, the channel state information including at least one of: CQI, PMI, or RI.
  • the present embodiment is used to implement each of the above-mentioned method embodiments.
  • a working flow and a working principle of each unit in the present embodiment are determined by description in each of the above-mentioned method embodiments, and will not be elaborated herein.
  • a predefined pattern for carrying information is determined, the predefined pattern includes a predefined sequence or a predefined RS time frequency structure; and the predefined pattern carrying the information is transmitted on a preset time-frequency domain resource.
  • ACK/NACK can be transmitted even when the length of a TTI is shortened in time domain, it is convenient for a receiver to demodulate a predefined pattern without reference information, a hopping gain can be easily achieved, and information can be implicitly transmitted by fully utilizing the positions of RSs to improve the utilization rate of resources.
  • a subframe is occupied in time domain
  • a PRB is occupied in frequency domain
  • inter-timeslot hopping is used.
  • Different cells adopt group hopping to select different QPSK-based basic sequences, and a group hopping period is a timeslot.
  • a time domain randomization method is employed to obtain different cyclic shift sequences of an identical basic sequence.
  • a time domain spreading method is employed to increase the number of multiplexing users.
  • the TTI has a length of merely 1 to 7 Single-Carrier Frequency-Division Multiple Access (SC-FDMA) symbols.
  • SC-FDMA Single-Carrier Frequency-Division Multiple Access
  • FIG. 4 shows a sending diagram of K-bit ACK/NACK fed back in a PUCCH when a TTI adopts a single symbol length.
  • N UEs send ACK/NACK messages, each UE feeding back K-bit ACK/NACK, respectively represented by a K -1 , a K -2 ,..., a 1 , a 0 , where ACK at a corresponding bit position is represented by "1", and NACK is represented by "0".
  • a decimal number corresponding to a binary sequence formed by a K -2 ,..., a 1 , a 0 is defined as i.
  • an used cyclic shift is CS 0 .
  • 4-bit ACK/NACK is sent, 7 cyclic shifts are allocated.
  • the probability of transmitting ACK is usually much higher than the probability of transmitting NACK, and when the number of 1 in a K -2 ,..., a 1 , a 0 is large, a cyclic shift with better correlation is correspondingly used.
  • the target probability of correct NACK demodulation is higher, and when the number of 0 in a k -2 , .. ., a 1 , a 0 is large, a cyclic shift with better correlation is correspondingly used.
  • Cyclic shift indexes used by different UEs may be allocated by a base station, or obtained according to a physical layer cell identity of a cell, or calculated according to C-RNTIs allocated to UEs by a cell, or obtained according to a TTI index, or obtained by combining the above-mentioned factors.
  • comb subcarrier offsets may be used, or the same comb subcarrier offset but different cyclic shifts may be used.
  • a comb subcarrier mapping mode contributes to increase of a diversity gain in frequency domain, reduces the number of bits for representing ACK/NACK by using a cyclic shift, is convenient for synchronization, and may be used for rapid ACK/NACK feedback during out of synchronization of the uplink.
  • the comb subcarrier mapping mode may implement simultaneous transmission of an ACK/NACK message and SRSs of other UEs at the same frequency domain position.
  • a ZC sequence with better correlation reduces interference of the ACK/NACK message between UEs.
  • FIG. 5 shows a sending diagram of K-bit ACK/NACK fed back in a PUCCH when a TTI occupies a 7-symbol length.
  • N UEs send uplink ACK/NACK messages, each UE feeding back K-bit ACK/NACK, respectively represented by a K -1 , a K -2 ,..., a 1 , a 0 .
  • a PUCCH occupies 4 PRBs in frequency domain.
  • a decimal number corresponding to a binary sequence formed by a K -2 ,..., a 1 , a 0 is defined as i.
  • an ACK/NACK sending rule is: when K>1, a K -1 is represented by using a comb subcarrier offset offset ( s ), and a K -2 ,..., a 1 , a 0 is represented by using a cyclic shift CS s,i .
  • the cyclic shift used is CS s ,0 .
  • ACK/NACKs of different users are distinguished by different cyclic shifts of an identical ZC sequence, and comb offsets of different users at the same symbol position may be the same or different.
  • cyclic shift indexes and comb offsets used on each SC-FDMA symbol of different UEs may be allocated by a base station, or obtained according to a physical layer cell identity of a cell, or calculated according to C-RNTIs allocated to UEs by a cell, or obtained according to a TTI index, or obtained by combining the above-mentioned factors.
  • a comb subcarrier mapping mode contributes to increase of a diversity gain in frequency domain, reduces the number of bits for representing ACK/NACK by using a cyclic shift, is convenient for synchronization, and may be used for rapid ACK/NACK feedback during out of synchronization of the uplink.
  • Cyclic shifts and comb offsets used by each UE between different symbols are variable, thereby reducing interference of ACK/NACK messages between different UEs.
  • FIG. 6 shows a sending diagram of K-bit ACK/NACK fed back in a PUCCH when a TTI occupies a 2-symbol length.
  • N UEs send uplink ACK/NACK messages, each UE feeding back K-bit ACKs/NACKs, respectively represented by a K -1 , a K -2 ,..., a 1 , a 0 .
  • ACK/NACK information of each user is mapped to different frequency domain positions of two SC-FDMA symbols, frequency domain indexes are n r,s respectively, namely hopping exists between symbols, and each hopping position occupies 6 PRBs.
  • Each symbol is mapped as a comb structure, and a comb subcarrier offset in frequency domain is offset.
  • a decimal number corresponding to a binary sequence formed by a K -2 ,..., a 1 , a 0 is defined as i
  • a decimal number corresponding to a binary sequence formed by a 0 , a 1 ,..., a K -2 is defined as j
  • an ACK/NACK sending rule is as follows.
  • ACKs/NACKs of different users are distinguished by different cyclic shifts of an identical ZC sequence.
  • Cyclic shift indexes used by different UEs may be allocated by a base station, or obtained according to a physical layer cell identity of a cell, or calculated according to C-RNTIs allocated to UEs by a cell, or obtained according to a TTI index, or obtained by combining the above-mentioned factors.
  • a comb subcarrier mapping mode contributes to increase of a diversity gain in frequency domain, reduces the number of bits for representing ACKs/NACKs by using a cyclic shift, is convenient for synchronization, and may be used for rapid ACK/NACK feedback during out of synchronization of the uplink.
  • a ZC sequence with better correlation reduces interference of ACK/NACK messages between UEs.
  • FIG. 7 shows a diagram of joint transmission of K-bit ACK/NACK fed back in a PUCCH and an SRS when a TTI has a single symbol length.
  • a frequency domain positions allocated to the ACK/NACK within this TTI symbol are X
  • a frequency domain positions allocated to the SRS are Y
  • both PUCCH and SRS occupy 4 PRBs in frequency domain.
  • N UEs each UE feeding back K-bit ACK/NACK, respectively represented by a K -1 , a K -2 ,..., a 1 , a 0 .
  • M 2 K -1 different cyclic shifts, respectively represented by CS 0 , CS 1 ,..., CS i ,..., CS 2 K -1 -1 , are allocated to each user to transmit the ACK/NACK.
  • a rule of sending ACK/NACK by the UE is: if only the ACK/NACK is to be sent in the current TTI symbol, the ACK/NACK is sent at the frequency domain positions X by using the cyclic shift CS i and the domain offset offse i ; and if both the ACK/NACK and the SRS are sent simultaneously in a current TTI symbol, the ACK/NACK is sent at the frequency domain positions Y by using the cyclic shift CS i and the domain offset offset i .
  • N symb UL is the number of SC-FDMA symbols within each timeslot
  • synchronization between ACK/NACK group hopping and related SRS group hopping based on a single symbol TTI can be implemented. That is, within the same cell, ACK/NACK information and SRSs adopt the same basic sequence.
  • n 0 ′ t s corresponding to different UEs may be 0, 1, 2, 3.
  • Indexes n 0 ( t s ) corresponding to 0 th cyclic shifts of 4 UEs are 0, 3, 6, 9 respectively, and indexes n 1 ( t s ) corresponding to first cyclic shifts are 12, 15, 18, 21 respectively, that is, two cyclic shifts used by 4 UEs are: (0, 12), (3, 15), (6, 18), (9, 21) respectively.
  • Basic sequences, cyclic shifts and comb offsets used by different UEs may also be allocated by a base station, or obtained according to a physical layer cell identity of a cell, or calculated according to C-RNTIs allocated to UEs by a cell, or obtained according to a TTI index, or obtained by combining the above-mentioned factors.
  • a comb subcarrier mapping mode contributes to increase of a diversity gain in frequency domain, reduces the number of bits for representing ACK/NACK by using a cyclic shift, is convenient for synchronization, and may be used for rapid ACK/NACK feedback during out of synchronization of the uplink.
  • the cyclic shift determination method provided in the present embodiment may uniformly discretize cyclic shift intervals of different UEs, thereby reducing interference between different UEs.
  • FIG. 8 shows an example of joint transmission of a K-bit ACK/NACK message fed back in a PUCCH and an SRS when a TTI has a single symbol length. It is assumed that frequency domain positions allocated to ACK/NACK within a TTI symbol are X, frequency domain positions allocated to SRSs are Y, a PUCCH occupies 4 PRBs in frequency domain, and SRSs occupy 8 PRBs in frequency domain.
  • M 2 K -1 different cyclic shifts, respectively represented by CS 0 , CS 1 ,..., CS i ,..., CS 2 K-1 -1 , are allocated to each user to transmit the ACK/NACK.
  • a rule of sending ACK/NACK by the UE is: if only the ACK/NACK is sent in a current TTI symbol, the ACK/NACK is sent at the frequency domain positions X by using the cyclic shift CS i and the domain offset offset i ; and if the ACK/NACK and the SRS are sent simultaneously in the current TTI symbol, the ACK/NACK is sent at the frequency domain positions Y by using the bit reversal repetition CS i ′ and the domain offset offset i .
  • basic sequences, cyclic shifts and comb offsets used by different UEs may also be allocated by a base station, or obtained according to a physical layer cell identity of a cell, or calculated according to C-RNTIs allocated to UEs by a cell, or obtained according to a TTI index, or obtained by combining the above-mentioned factors.
  • a comb subcarrier mapping mode contributes to increase of a diversity gain in frequency domain, reduces the number of bits for representing ACK/NACK by using a cyclic shift, is convenient for synchronization, and may be used for rapid ACK/NACK feedback during out of synchronization of the uplink.
  • the bit reversal repetition sequence designed in the present embodiment has a better peak-to-average ratio.
  • FIG. 9 shows a sending diagram of joint transmission of a full-bandwidth mapped ACK/NACK message and an SRS when a TTI occupies a single symbol length.
  • a PUCCH bandwidth is B MHz, totally used for bearing an ACK/NACK message and an SRS message.
  • Each UE feeds back K-bit ACK/NACK, respectively represented by a K -1 , a K-2 ,..., a 1 , a 0 .
  • the ACK/NACK and the SRS adopt the same basic sequence adopting cyclic extension of a ZC sequence.
  • ACK/NACKs between different users and SRSs between different users are distinguished by using different cyclic shifts of an identical ZC sequence.
  • Cyclic shift indexes used by different UEs may be allocated by a base station, or calculated according to C-RNTIs of a cell, or calculated according to C-RNTIs allocated to UEs by a cell, or obtained according to a TTI index, or obtained by combining the above-mentioned factors.
  • FIG. 10 shows a sending diagram of 1-2bit ACK/NACK messages fed back in a PUCCH when a TTI occupies a 2-symbol length.
  • 1-2bit ACK/NACK messages are implicitly represented by mapping RSs to different symbols or different subcarrier positions, where Data may be used to transmit other signaling in a PUCCH such as CQI/PMI/RI.
  • a receiver may determine whether ACK or NACK is fed back by blindly detecting two positions of an RS.
  • the two positions may be determined according to, not limited to a symbol position of ACK/NACK, or may be implicitly determined by mapping the RS to non-contiguous comb subcarriers via different offsets of the comb subcarriers.
  • the structure as shown in FIG. 10-2 or the structure combined with the structure as shown in FIG. 10-1 may be used.
  • a receiver may determine fed-back 2-bit ACK/NACK information by blindly detecting four positions of an RS.
  • the four positions are not limited to the structure as shown in FIG. 10 , or are implicitly determined by mapping the RS to non-contiguous comb subcarriers via different offsets of the comb subcarriers.
  • the implicit transmission used in the present embodiment is advantageous in that ACK/NACK information can be effectively fed back without additional time-frequency resources.
  • FIG. 11 shows a sending diagram of 1-2bit ACK/NACK messages fed back in a PUCCH when a TTI occupies a 7-symbol length.
  • 1-2bit ACK/NACK information is implicitly represented by different mapping symbol positions of an RS, where Data may be used to transmit other signaling of a PUCCH, such as CQI/PMI/RI.
  • FIG. 11-1 shows an alternative pattern of two RS positions
  • FIG. 11-2 shows an alternative pattern containing only one RS.
  • the Data and the RS are distinguished by using different cyclic shifts.
  • basic sequences and cyclic shifts used by data symbols and RSs of different UEs may be allocated by a base station, or calculated according to C-RNTIs of a cell, or calculated according to C-RNTIs allocated to UEs by a cell, or obtained according to a TTI index, or obtained by combining the above-mentioned factors.
  • a corresponding relationship between different RS positions and ACK/NACK may be as follows.
  • 2-bit NACK information When 2-bit ACK/NACK information is to be fed back, 2-bit NACK information is represented by 1, and 2bit ACK information is represented by 4. That is, an RS position corresponding to the NACK information should be near the front as much as possible, thereby reducing delay of data re-preparation by an eNB for NACK feedback.
  • 2-bit ACK/NACK information when 2-bit ACK/NACK information is to be fed back, 2-bit ACK information is represented by 1, and 2-bit NACK information is represented by 4. That is, an RS position corresponding to the ACK information should be near the front as much as possible . Because the probability of ACK feedback is greater than the probability of NACK feedback, the statistic average delay is reduced.
  • the implicit transmission used in the present embodiment is advantageous in that ACK/NACK information can be effectively fed back without additional time-frequency resources.
  • the present embodiment may also be applied to a related 1ms PUCCH Format 2 structure.
  • the embodiments of the disclosure also provide a computer storage medium in which a computer-executable instruction is stored.
  • the computer-executable instruction is used to execute the method in the above-mentioned embodiments.
  • each module/unit in the above-mentioned embodiments may be implemented in a form of hardware, and for example, corresponding functions thereof are implemented by means of an integrated circuit.
  • Each module/unit may also be implemented in a form of software function module, and for example, corresponding functions thereof are implemented by executing programs/instructions stored in a memory by the processor.
  • the disclosure is not limited to the combination of hardware and software in any specific form.

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Claims (3)

  1. Verfahren zur Informationsübertragung, dadurch gekennzeichnet, dass es umfasst:
    Bestimmen (101) eines vordefinierten Musters zum Darstellen von Informationen, wobei das vordefinierte Muster eine vordefinierte Sequenz umfasst und die Informationen eine Bestätigung (ACK) oder eine negative Bestätigung (NACK) umfassen; und
    Übertragen (102) des vordefinierten Musters, das die Informationen darstellt, auf einer voreingestellten Zeit-Frequenz-Domänen-Ressource,
    wobei, wenn das vordefinierte Muster die vordefinierte Sequenz ist, die voreingestellte Zeit-Frequenz-Domänen-Ressource eine voreingestellte Zeit-Domänen-Ressource und eine voreingestellte Frequenz-Domänen-Ressource umfasst; die voreingestellte Zeit-Domänen-Ressource ein Übertragungszeitintervall (Transmission Time Interval, TTI) mit einer Dauer von K Symbolen umfasst, wobei K größer oder gleich 1 und kleiner oder gleich 7 und eine positive ganze Zahl ist; und die voreingestellte Frequenz-Domänen-Ressource M Unterträger umfasst, wobei die M Unterträger als eine Kammstruktur in der Frequenzdomäne abgebildet werden, wobei eine Frequenzdomänen-Versatzzahl Nein ganzzahliges Vielfaches von 2 ist und Mein ganzzahliges Vielfaches von 12 ist, wobei der Frequenzdomänen-Versatz einen Versatz eines anfänglichen Unterträgerindex relativ zu einem niedrigsten Index von entsprechenden Ressourcenblöcken anzeigt, wobei die M Unterträger als die Kammstruktur in der Frequenzdomäne abgebildet werden, und die Frequenzdomänen-Versatzzahl eine Gesamtzahl der Frequenzdomänen-Versätze ist.
  2. Verfahren nach Anspruch 1, wobei die vordefinierte Sequenz eine Länge L aufweist, die ein ganzzahliges Vielfaches von 12 ist, eine Basissequenz der vordefinierten Sequenz eine Quadratur-Phasenumtastungs-(QPSK)-basierte Sequenz oder eine Zadoff-Chu-(ZC)-Sequenz umfasst und eine Sequenz in der vordefinierten Sequenz basierend auf der Basissequenz erhalten wird.
  3. Vorrichtung zur Informationsübertragung, dadurch gekennzeichnet, dass sie umfasst:
    eine Bestimmungseinheit (11), die angeordnet ist, um ein vordefiniertes Muster zum Darstellen von Informationen zu bestimmen, wobei das vordefinierte Muster eine vordefinierte Sequenz umfasst und die Informationen eine Bestätigung (ACK) oder eine negative Bestätigung (NACK) umfassen; und
    eine Übertragungseinheit (12), die angeordnet ist, um das vordefinierte Muster, das die Informationen darstellt, auf einer voreingestellten Zeit-Frequenz-Domänen-Ressource zu übertragen,
    wobei, wenn das vordefinierte Muster die vordefinierte Sequenz ist, die voreingestellte Zeit-Frequenz-Domänen-Ressource eine voreingestellte Zeit-Domänen-Ressource und eine voreingestellte Frequenz-Domänen-Ressource umfasst; die voreingestellte Zeit-Domänen-Ressource ein Übertragungszeitintervall (Transmission Time Interval, TTI) mit einer Dauer von K Symbolen umfasst, wobei K größer oder gleich 1 und kleiner oder gleich 7 und K eine positive ganze Zahl ist; und die voreingestellte Frequenz-Domänen-Ressource M Unterträger umfasst, wobei die M Unterträger als eine Kammstruktur in der Frequenzdomäne abgebildet werden, wobei eine Frequenzdomänen-Versatzzahl Nein ganzzahliges Vielfaches von 2 ist und Mein ganzzahliges Vielfaches von 12 ist, wobei der Frequenzdomänen-Versatz einen Versatz eines anfänglichen Unterträgerindex relativ zu einem niedrigsten Index von entsprechenden Ressourcenblöcken anzeigt, wobei die M Unterträger als die Kammstruktur in der Frequenzdomäne abgebildet werden, und die Frequenzdomänen-Versatzzahl eine Gesamtzahl der Frequenzdomänen-Versätze ist.
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